/**
 * 校验身份证号
 * @author zido
 * @since 2017/6/12 0012
 */
export default (code) => {
  let city={11:'北京',12:'天津',13:'河北',14:'山西',15:'内蒙古',21:'辽宁',22:'吉林',23:'黑龙江 ',31:'上海',32:'江苏',33:'浙江',34:'安徽',35:'福建',36:'江西',37:'山东',41:'河南',42:'湖北 ',43:'湖南',44:'广东',45:'广西',46:'海南',50:'重庆',51:'四川',52:'贵州',53:'云南',54:'西藏 ',61:'陕西',62:'甘肃',63:'青海',64:'宁夏',65:'新疆',71:'台湾',81:'香港',82:'澳门',91:'国外 '}

  if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[12])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)){
    //tip = '身份证号格式错误'
    return false
  }

  else if(!city[code.substr(0,2)]){
    //tip = '地址编码错误'
    return false
  }
  else{
    //18位身份证需要验证最后一位校验位
    if(code.length === 18){
      code = code.split('')
      //∑(ai×Wi)(mod 11)
      //加权因子
      let factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ]
      //校验位
      let parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ]
      let sum = 0
      let ai = 0
      let wi = 0
      for (let i = 0; i < 17; i++)
      {
        ai = code[i]
        wi = factor[i]
        sum += ai * wi
      }
      let last = parity[sum % 11]
      if(last+'' !== code[17]){
        return false
      }
    }
  }
  return true
}